Camera



EXAMINER EX 1;)?5535 S R RENCE FIPBZIZ G. CAMILLI CAMERA Invent op;

(Egglielmo Camilfi, 93 WW His Atborn Patented Nov. 7, 1933 PATENT OFFICE Gamma Guglielmo Camllll, Plttsileld.

General Electric Company,

New York Application Mass.,asslgno to a corporation of Jamil" 31, 1981. Serial No. 512,708

2 Olaims- (a. 88-46) My invention relates to cameras he!!! means such as a diaphragm for varying the amount of light admited to the light sensitive member thereof. It is the object of my invention to provide such a camera with means for automatically controlling the light varyin means in accordance with the illumination camera.

My invention will be better understood from the following description taken in connection with the accompanying drawing, and its scope will be pointed out in the appended claims.

In the single figure trates one embodiment of my invention in the 1 form of a motion picture camera, the lens 1 forms on the light sensitive member or him 2 the image of the view or object being photographed. Adiacent the lens 1 is the diaphragm 3 which is shown as an iris diaphragm, such being the form usuiIO ally employed, having an operating portion 4 which, in the present case, is in the form of a gear segment. In the path of light rays admitted by the diaphragm is the rotatable shutter 5 which in the present case is shown having one 88 transparent sector and one opaque sector. The construction thus far described is that commonly employed in motion picture cameras and is well understood by those skilled in the art; the shut- .terservingtopermittheexposureofthefllm only during those periods when the film is stationary. The opaque sector 6 shown as conical in formation, a portion of the sector being covered by the mirror '1. Arranged eally illustrated at 9, the output of which amplifier is employed to control the setting of the diaphragm 3. Various means may be employedto accom thiscontrol. Inthe drawin have illustrated the solenoid 10 which is arranged in the plate circult'of the amplifier including a variable resistance 11. The core 12 which ismounted B to move fmely in and out of the solenoid 10 connectswiththeracklemeshingwiththegear segment 4. Attached1 to the end of of the drawing which illusof the shutter is thersckliphragm is thus automatically set in accordance with the intensity of light coming from the view being photographed. It will be understood that the apparatus is suitably calibrated such that no manual'adiustment sary to bring about the proper exposure of the of the i'ield of view of the film In the interest of greater clearness and to avoid unnecessary complication in the drawing, I have purposely omitted certain well known features of the camera, such for example as the supports for the various parts illustrated, the light tight housing and the apparatus for moving the shutter and for producing an intermittent movement of the rum. I have also purp sely omitted any showing of the manner of supporting and enclosing the photo-electric cell and of supportin the core 12 and connected rack 14. I have chosen the particular embodiment described above as illustrative oi my invention and it will be apparent that various other modifications may be made without departing from the spirit and scope of my invention.

whatlclaimasnewanddesire tosecureby Letters Patent of the United States, is:

i. In combination, a camera having a diaphragm, means for intermittently intercepting the light admitted by said diaphragm a photoelectric device, said light intercepting means infor varyin the setting of the diaphragm.

2. A motion picture camera having "a lens, a diaphragm and a shutter, vice, a mirror on the shutter arranged to reflect into the device light imaged by the lens and admitted by the diaphragm, and electro-magnetic means controlled by the device for varyin the setting of the diaphragm.

GJIGIJIIMO CAME-LI.

of the diaphragm is necesa photo-electric de- 

